February 2026: CI/CD Versioning and Compatibility Enhancements for RustPython/RustPython. Upgraded CI Python version to 3.14.3, refactored version handling to a centralized variable for easier future updates, and fixed the CPython clone command to align with the new versioning. These changes improve build stability across environments, reduce maintenance overhead, and ensure downstream tooling remains compatible.

January 2026 (RustPython/RustPython) — Delivered improvements that strengthen cross-platform compatibility, testing resilience, and developer tooling, while optimizing CI efficiency to accelerate delivery. Key features delivered and major improvements: - CPython 3.14 compatibility and async testing improvements: aligned warnings handling and async/coroutine testing with expanded cross-platform test coverage to ensure reliability and ecosystem compatibility. - XML parsing robustness and debugging support: added ExpatError alias (error) in pyexpat and introduced opcode tracing (f_trace_opcodes) to improve debugging capabilities in the RustPython interpreter. - CI/build pipeline optimizations: built RustPython with no default features and migrated issue_assign CI runner to ubuntu-slim to reduce resource usage and shorten build times. Top 3-5 achievements: 1) CPython 3.14 alignment with enhanced async test coverage across platforms. 2) Robust XML parsing: ExpatError alias and opcode tracing for better debugging tooling. 3) CI efficiency gains: no-default-features build and ubuntu-slim runner, reducing CI costs and time. Impact and value: - Higher compatibility with CPython 3.14, enabling easier ecosystem integration and fewer platform-specific test failures. - Improved reliability and debuggability of async code paths and XML parsing, benefiting downstream users and contributors. - Faster CI feedback loops and lower resource consumption, accelerating feature delivery and iteration cycles. Technologies/skills demonstrated: CPython compatibility, async testing, pyexpat enhancement, opcode tracing, RustPython internals, and CI automation.